Updates

Author: Programmer-RD-AI

Array_List.java

@@ -0,0 +1,16 @@
+public class Array_List{
+    public static void main(String[] args){
+        java.util.ArrayList<String> food = new java.util.ArrayList<String>();
+        food.add("pizza");
+        food.add("hamburger");
+        food.add("hotdog");
+        food.set(0, "sushi");
+        food.remove(2);
+        food.clear();
+        for (int i = 0; i < food.size(); i++){
+            System.out.println(food.get(i));
+        }
+//        when using a int or smthn you gotta use the Integer wrapper class
+        return;
+    }
+}

ForEach.java

@@ -0,0 +1,17 @@
+import java.util.ArrayList;
+
+public class ForEach{
+    public static void main(String[] args){
+//        String[] animals = {"cat", "dog", "rat", "bird"};
+        ArrayList<String> animals = new ArrayList<String>();
+
+        animals.add("cat");
+        animals.add("dog");
+        animals.add("rat");
+        animals.add("bird");
+        for (String i : animals){
+            System.out.println(i);
+        }
+        return;
+    }
+}

Main.java

@@ -1,11 +1,12 @@
-import java.util.ArrayList;
-
 public class Main{
     public static void main(String[] args){
-        ArrayList<String> food = new ArrayList<String>();
-        food.add("pizza");
+        String name = "Bro";
+        hello(name);
+        return;
+    }
 
-//        when using a int or smthn you gotta use the Integer wrapper class
+    static void hello(String name){
+        System.out.println("hello " + name);
         return;
     }
 }

TwoDArrayList.java

@@ -0,0 +1,25 @@
+import java.util.ArrayList;
+
+public class TwoDArrayList{
+    public static void main(String[] args){
+        ArrayList<ArrayList<String>> groceryList = new ArrayList();
+
+        ArrayList<String> bakeryList = new ArrayList();
+        bakeryList.add("pasta");
+        bakeryList.add("garlic bread");
+        bakeryList.add("donuts");
+        System.out.println(bakeryList);
+
+        ArrayList<String> produceList = new ArrayList();
+        produceList.add("tomatos");
+        produceList.add("zuuchini");
+        produceList.add("peppers");
+        System.out.println(bakeryList);
+
+        groceryList.add(bakeryList);
+        groceryList.add(produceList);
+
+        System.out.println(groceryList);
+        return;
+    }
+}